Convertible hearing aid/tinnitus masker



FIG. 1 is a perspective view of a convertible hearing aid/tinnitus masker of my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is bottom view thereof. 

The ornamental design for a convertible hearing aid/tinnitus masker, as shown and described. 